Hi, I have opened the following bug report because I couldn’t attach the example zip on the email:
https://bugreports.qt.io/browse/QTBUG-126734 Thank you! Best regards, Nuno > On 27 Jun 2024, at 15:20, Nuno Santos <nuno.san...@imaginando.pt> wrote: > > Hi, > > After spending the two last days trying to understand the cause of this > problem this is what I have found and it is still very puzzling. > > - The example Scene Graph - Graph works when compiled with my custom compiled > from the source Qt 6.6.3 kit on the RX 7600 > - If I use exactly the same vert and frag shaders from the Scene Graph - > Graph example on my application, I no longer have the error: > >> failed to link shader program: error: fail to build reflection info > > - If I add or remove a single field from the uniforms structure, the error > returns. > > If in the Scene Graph - Graph example I add the field resolution to the > noisy.frag uniforms and compile it again, just like this: > > layout(std140, binding = 0) uniform buf { > mat4 qt_Matrix; > vec4 color; > vec2 textureSize; > float qt_Opacity; > vec2 resolution; // added field > }; > > The noisy node fails to pain with the same error: > >> failed to link shader program: error: fail to build reflection info > > > So the cause of problem is the customisation of the uniforms structure. Once > again, this only happens on the RX 7600. It is working perfectly for Apple > Silicon, Intel Graphics, NVIDIA. > > So, now my questions are: > > - Is there anything else that is not stated in the documentation that serves > as validation for the uniforms structure that? > - Is there anything particular to AMD graphics cards that could possibly > causing this problem? > > > I’m not completely in the dark now but I still don’t have a clue of what is > going on. > > Maybe its time to fill a bug report now? > > Please advise. > > Thank you! > > Best regards, > > Nuno > >> On 25 Jun 2024, at 15:19, Nuno Santos <nuno.san...@imaginando.pt> wrote: >> >> Hi, >> >> I’m having an issue. I’m pretty sure this will be a basic one. >> >> I’m rewriting VS - Visual Synthesizer to Qt 6. VS consists in a set of frag >> shaders that are layered to compose a visual scene that reacts to music >> >> There is a factory bank with several of this shaders. With Qt 6 we are still >> using OpenGL for previous compatibility but the shaders are being compiled >> to qsb. >> >> It is working on Apple Silicon, Windows PC with Intel Card, NVIDIA card but >> with an AMD card it is saying: >> >> failed to build graphics pipeline state >> failed to link shader program: error: fail to build reflection info >> >> Am I missing something? Maybe during the shader compilation to qsb? >> >> Thank you! >> >> Best regards, >> >> Nuno Santos >> >> >
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